I have however some very positive news for you. David, my son, has worn the Magna Max on his wrist since it arrived and after several days of trying different set ups settled on a configuration that "felt right". The interesting thing incidentally was David's first reaction when he put the Magna Max on. Within two minutes he asked if it was supposed to tingle!! I don't know what this means but what it did seem to do was give him immediate confidence that the product was working. Click on the "water mark" for the full letter